I would like to try an unattended install the SQL Compare tool from the bundle.
I can extract the .msi file from the downloaded .exe.
What are the command line options I need to pass to selectively install individual components and also the EULA consent ?

I'm not aware of a way to avoid the UI during the extract stage. However, you could run the extract on your own machine and then only distribute the .msi for those tools which you want to install. Therefore only the install part needs to run on each machine.